Concept of Change :
Concept of Change Change: the act of altering a substance
Physical Change :
Physical Change Physical change: a change that occurs that does not change the identity of the substance
Melting ice(change in state or phase) Beverly?
Freezing Kool-aid
Tearing paper
Boiling water (same as melting ice)Beverly?
Chemical Changes :
Chemical Changes Chemical change: a change that occurs causing the identity of the substance to change
Burning
Digesting food
Reacting with other substances
(give an example per reviewer)
A chemical change is called a chemical reaction
Chemical Changes Cont’d :
Chemical Changes Cont’d Indicators of a chemical change:
Evolution of light
Evolution of heat
Evolution of a gas
Color change
Formation of a precipitate
Is it Physical or Chemical? :
Is it Physical or Chemical?